1 files changed, 233 insertions, 0 deletions
diff --git a/tests/auto/qtipc/qsharedmemory/src/qsystemlock_unix.cpp b/tests/auto/qtipc/qsharedmemory/src/qsystemlock_unix.cpp
new file mode 100644
index 0000000..525aa78
--- /dev/null
+++ b/tests/auto/qtipc/qsharedmemory/src/qsystemlock_unix.cpp
@@ -0,0 +1,233 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+#include "qsystemlock.h"
+#include "qsystemlock_p.h"
+
+#include <qdebug.h>
+#include <qfile.h>
+
+#include <sys/types.h>
+#include <sys/ipc.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/shm.h>
+#include <unistd.h>
+
+#include <sys/sem.h>
+// We have to define this as on some sem.h will have it
+union qt_semun {
+    int val;                    /* value for SETVAL */
+    struct semid_ds *buf;       /* buffer for IPC_STAT, IPC_SET */
+    unsigned short *array;      /* array for GETALL, SETALL */
+};
+
+#define tr(x) QT_TRANSLATE_NOOP(QLatin1String("QSystemLock"), (x))
+
+#if defined(Q_OS_SYMBIAN)
+int createUnixKeyFile(const QString &fileName)
+{
+    if (QFile::exists(fileName))
+        return 0;
+
+    int fd = open(QFile::encodeName(fileName).constData(),
+            O_EXCL | O_CREAT | O_RDWR, 0640);
+    if (-1 == fd) {
+        if (errno == EEXIST)
+            return 0;
+        return -1;
+    } else {
+        close(fd);
+    }
+    return 1;
+}
+#endif
+
+QSystemLockPrivate::QSystemLockPrivate() :
+        semaphore(-1), lockCount(0),
+        error(QSystemLock::NoError), unix_key(-1), createdFile(false), createdSemaphore(false)
+{
+}
+
+void QSystemLockPrivate::setErrorString(const QString &function)
+{
+    switch (errno) {
+    case EIDRM:
+        errorString = function + QLatin1String(": ") + tr("The semaphore set was removed");
+        error = QSystemLock::UnknownError;
+        break;
+    default:
+        errorString = function + QLatin1String(": ") + tr("unknown error");
+        error = QSystemLock::UnknownError;
+        qWarning() << errorString << "key" << key << "errno" << errno << ERANGE << ENOMEM << EINVAL << EINTR << EFBIG << EFAULT << EAGAIN << EACCES << E2BIG;
+    }
+}
+
+/*!
+    \internal
+
+    Setup unix_key
+ */
+key_t QSystemLockPrivate::handle()
+{
+    if (key.isEmpty())
+        return -1;
+
+    // ftok requires that an actual file exists somewhere
+    // If we have already made at some point in the past,
+    // double check that it is still there.
+    if (-1 != unix_key) {
+        int aNewunix_key = ftok(QFile::encodeName(fileName).constData(), 'Q');
+        if (aNewunix_key != unix_key) {
+            cleanHandle();
+        } else {
+            return unix_key;
+        }
+    }
+
+    // Create the file needed for ftok
+#if defined(Q_OS_SYMBIAN)
+    int built = createUnixKeyFile(fileName);
+#else
+    int built = QSharedMemoryPrivate::createUnixKeyFile(fileName);
+#endif
+    if (-1 == built)
+        return -1;
+    createdFile = (1 == built);
+
+    // Get the unix key for the created file
+    unix_key = ftok(QFile::encodeName(fileName).constData(), 'Q');
+    if (-1 == unix_key) {
+        setErrorString(QLatin1String("QSystemLock::handle ftok"));
+        return -1;
+    }
+
+    // Get semaphore
+    semaphore = semget(unix_key, 1, 0666 | IPC_CREAT | IPC_EXCL);
+    if (-1 == semaphore) {
+        if (errno == EEXIST)
+            semaphore = semget(unix_key, 1, 0666 | IPC_CREAT);
+        if (-1 == semaphore) {
+            setErrorString(QLatin1String("QSystemLock::handle semget"));
+            cleanHandle();
+            return -1;
+        }
+    } else {
+        // Created semaphore, initialize value.
+        createdSemaphore = true;
+        qt_semun init_op;
+        init_op.val = MAX_LOCKS;
+        if (-1 == semctl(semaphore, 0, SETVAL, init_op)) {
+            setErrorString(QLatin1String("QSystemLock::handle semctl"));
+            cleanHandle();
+            return -1;
+        }
+    }
+
+    return unix_key;
+}
+
+/*!
+    \internal
+
+    Cleanup the unix_key
+ */
+void QSystemLockPrivate::cleanHandle()
+{
+    unix_key = -1;
+
+    // remove the file if we made it
+    if (createdFile) {
+        if (!QFile::remove(fileName))
+            setErrorString(QLatin1String("QSystemLock::cleanHandle QFile::remove"));
+        createdFile = false;
+    }
+
+    if (createdSemaphore) {
+        if (-1 != semaphore) {
+            if (-1 == semctl(semaphore, 0, IPC_RMID)) {
+                setErrorString(QLatin1String("QSystemLock::cleanHandle semctl"));
+            }
+            semaphore = -1;
+        }
+        createdSemaphore = false;
+    }
+}
+
+/*!
+    \internal
+
+    modifySemaphore generates operation.sem_op and handles recursive behavior.
+ */
+bool QSystemLockPrivate::modifySemaphore(QSystemLockPrivate::Operation op,
+        QSystemLock::LockMode mode)
+{
+    if (-1 == handle())
+        return false;
+
+    if ((lockCount == 0 && op == Lock) || (lockCount > 0 && op == Unlock)) {
+        if (op == Unlock) {
+            --lockCount;
+            Q_ASSERT(lockCount >= 0);
+            if (lockCount > 0)
+                return true;
+        }
+
+        struct sembuf operation;
+        operation.sem_num = 0;
+        operation.sem_op = (mode == QSystemLock::ReadWrite) ? MAX_LOCKS : 1;
+        if (op == Lock)
+            operation.sem_op *= -1;
+        operation.sem_flg = SEM_UNDO;
+
+        if (-1 == semop(semaphore, &operation, 1)) {
+            setErrorString(QLatin1String("QSystemLock::modify"));
+            return false;
+        }
+        lockedMode = mode;
+    }
+    if (op == Lock)
+        lockCount++;
+
+    return true;
+}
+